MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for extreme operating conditions ranging from -65°C to 200°C. Available in various mounting styles including front wall, rear wall, and jam nut receptacles, they ensure reliable connections in harsh environments. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors offer versatility for different applications. Constructed with high strength aluminum shells and plated with options like electroless nickel and cadmium finishes, they provide durability and corrosion resistance. Meeting stringent military specifications, these connectors are ideal for aerospace, defense, and industrial applications requiring rugged performance.